This book provides a comprehensive overview of the primary standards for the fundamental units of the SI system. It classifies the subtypes of electrical and radio measurements and analyzes the potential for developing basic standards based on quantum effects and fundamental physical constants. The text includes a detailed system of electrical standards, describing benchmarks for the intensity parameters of electrical oscillations (ranging from direct current to microwave frequencies), standards for circuit parameters (including circuits with concentrated constants), and standards for the shape and spectrum of radio signals. The book also outlines future prospects for the development of the standards base in the field of electrical and radio measurements. It is intended for a wide audience of professionals working in electrical and radio engineering and will be particularly beneficial for university students.